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The Photophysics of 7-(N,N'-diethylamino)coumarin-3-carboxylic Acid in water/AOT/isooctane Reverse Micelles: An Excitation Wavelength Dependent Study

The Photophysics of 7-(N,N'-diethylamino)coumarin-3-carboxylic Acid in water/AOT/isooctane Reverse Micelles: An Excitation Wavelength Dependent Study

Aninda Chatterjee, Banibrata Maity, Debabrata Seth

Phys Chem Chem Phys. 2013 Feb 14;15(6):1894-906.

PMID: 23254573

Abstract:

In this manuscript we have studied the photophysics of 7-(N,N'-diethylamino)coumarin-3-carboxylic acid (7-DCCA) in water/AOT/isooctane reverse micelles. For this purpose we have used steady state absorption and fluorescence emission spectroscopy and time resolved fluorescence spectroscopy. We have studied the spectral behaviour of 7-DCCA inside the water/AOT/isooctane reverse micelles with variation of excitation wavelength. We have studied the dynamics of solvent and rotational relaxation by using two different excitation wavelengths (λ(exi) = 375 nm and λ(exi) = 405 nm). We have observed the excitation wavelength dependent dynamics of 7-DCCA in the reverse micelles. The fluorescence quantum yield, decay time, solvent relaxation time and rotational relaxation time of 7-DCCA in reverse micelles vary with the excitation wavelength. A two step and wobbling-in-cone model was used to interpret the rotational relaxation dynamics of 7-DCCA in reverse micelles.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP50995749	7-(Diethylamino)coumarin-3-carboxylic acid		50995-74-9	Price

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